// --------------------------------------------------------------------------------------------------------------------
// <copyright file="KinectCalibrationDataLoader.cs" company="Microsoft Corporation">
// The MIT License (MIT)
// 
// Copyright (c) 2014, Microsoft Corporation
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
// </copyright>
// --------------------------------------------------------------------------------------------------------------------
namespace Microsoft.Robotics.Vision.Runtime.Cameras
{
    using System;    
    using System.IO;
    using System.Runtime.CompilerServices;
    using System.Runtime.Serialization;
    using Microsoft.Robotics.IO;

    /// <summary>
    /// Interface for calibration helper utility functionality.
    /// </summary>
    public interface IKinectCalibrationDataLoader
    {
        /// <summary>
        /// Import fitted polynomials for later use binary format
        /// </summary>
        /// <param name="filename">File prefix</param>
        /// <returns>Loaded table</returns>
        double[][] ImportTable(string filename);

        /// <summary>
        /// Export fitted polynomials for later use binary format
        /// </summary>
        /// <param name="filename">File prefix</param>
        /// <param name="table">Coefficients array to export</param>
        void ExportTable(string filename, double[][] table);
    }

    /// <summary>
    /// Helper utility class for handling Kinect depth correction
    /// </summary>
    public class KinectCalibrationDataLoader : IKinectCalibrationDataLoader
    {
        /// <summary>
        /// Import fitted polynomials for later use binary format
        /// </summary>
        /// <param name="filename">File prefix</param>
        /// <returns>Loaded table</returns>
        public double[][] ImportTable(string filename)
        {
            if (File.Exists(filename))
            {
                return Serializer.Load<double[][]>(filename);
            }
            else 
            {
                // This is not an exceptional case. It happens when no calibration file is 
                // specified
                return null;
            }
        }

        /// <summary>
        /// Export fitted polynomials for later use binary format
        /// </summary>
        /// <param name="filename">File prefix</param>
        /// <param name="table">Coefficients array to export</param>
        public void ExportTable(string filename, double[][] table)
        {
            DateTime now = DateTime.Now;
            string fullFileName = string.Format(
                "{0}_{1}_{2}_{3}_{4}_{5}_{6}.xml",
                filename,
                Environment.MachineName,
                now.Year,
                now.Month,
                now.Day,
                now.Hour,
                now.Minute);

            Serializer.Save<double[][]>(fullFileName, table);
        }
    }
}
